What this means
The IEEE assigned the MA-M block 5C857E3 to Cable Matters Inc.. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 5C:85:7E:3, it is Cable Matters Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 5C857E3?
5C857E3 is registered to Cable Matters Inc. in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Cable Matters Inc.'s block covers 1,048,576 addresses.
What devices use 5C857E3?
Any network device with a MAC address starting 5C:85:7E:3 was manufactured by or for Cable Matters Inc..